Operating the SA7x
4.1 SA7x Switches and Indicators
• The Fault/Set No. switch is a momentary pushbutton. When you press the
switch and hold it, it is set; when you release the switch, it is reset.
Table 4–1 SA7x Switch and Indicator Functions
Operator Control Panel Controls and Indicators
Switch/(Indicator
Color)
Switch Function
Indicator Function
Run (yellow)
Press to spin up the drive.
Release to spin down the drive.
On when drive has spun
up.
Off when the drive spindle
has stopped.
Fault/Set No.
(red)
Changes the drive unit number
when
in
the Unit Select Mode.
Press and hold to test indicator functions.
All OCP indicators should be on.
On when a fault detected.
Ready (green)
None.
On when drive ready to
read/write.
Unit Number
(red)
None.
Displays the drive unit
number.
Write Protect
(yellow)
Press to enable write protect.
On when write protect
enabled.
Port A (yellow)
Press to enable Port A for controller
selection.
On when Port A is on line
to system drive controller.
Port B (yellow)
Press to enable Port B for controller
selection.
On when Port A is on line
to system drive controller.
Unit Select
Press to enable Unit Selected mode.
None.
Lower Front Panel
Drive Power
(green),
one switch for
each drive
Press to apply power and start drive
self-test.
On when power applied to
drive.
Rear Panel Power Supply Chassis
Master On/Off
Apply line voltage to the power supply.
None.
Line voltage
selector
Selects power supply operating voltage:
either 120 Vac, 60 Hz or 240 Vac, 50 Hz.
None.
Fault (red)
None.
On when there is a fault
or an overtemperature
condition.
This indicator is inside the
power supply and is visible
through the power supply
grillwork.
Operating the SA7x 4–3
